Observation of B0→π0π0 -: art. no. 181803

被引：18

作者：

Chao, Y ^{[1
]}

Chang, P

Abe, K

Aihara, H

Akai, K

Akatsu, M

Akemoto, M

Asano, Y

Aushev, T

Bahinipati, S

Bakich, AM

Bay, A

Bedny, I

Bitenc, U

Bizjak, I

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Chen, A

Chen, KF

Chen, WT

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Chuvikov, A

Dalseno, J

Danilov, M

Dash, M

Dragic, J

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Fang, F

Flanagan, J

Fratina, S

Furukawa, K

Gabyshev, N

Garmash, A

Gershon, T

Gokhroo, G

Golob, B

Haba, J

Hastings, NC

Hayasaka, K

Hayashii, H

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

[2] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[3] Nihon Dent Coll, Niigata, Japan

[4] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[5] Chiba Univ, Chiba, Japan

[6] Chonnam Natl Univ, Kwangju, South Korea

[7] Univ Cincinnati, Cincinnati, OH 45221 USA

[8] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[9] Gyeongsang Natl Univ, Chinju, South Korea

[10] Univ Hawaii, Honolulu, HI 96822 USA

[11] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan

[12] Hiroshima Inst Technol, Hiroshima, Japan

[13] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[14] Inst High Energy Phys, Vienna, Austria

[15] Inst Theoret & Expt Phys, Moscow 117259, Russia

[16] Jozef Stefan Inst, Ljubljana, Slovenia

[17] Kanagawa Univ, Yokohama, Kanagawa, Japan

[18] Korea Univ, Seoul 136701, South Korea

[19] Kyungpook Natl Univ, Taegu 702701, South Korea

[20] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland

[21] Univ Ljubljana, Ljubljana, Slovenia

[22] Univ Maribor, SLO-2000 Maribor, Slovenia

[23] Univ Melbourne, Parkville, Vic 3052, Australia

[24] Nagoya Univ, Nagoya, Aichi, Japan

[25] Nara Womens Univ, Nara 630, Japan

[26] Natl Cent Univ, Chungli 32054, Taiwan

[27] Natl United Univ, Miaoli, Taiwan

[28] Niigata Univ, Niigata, Japan

[29] Osaka City Univ, Osaka 558, Japan

[30] Osaka Univ, Osaka, Japan

[31] Panjab Univ, Chandigarh 160014, India

[32] Peking Univ, Beijing 100871, Peoples R China

[33] Princeton Univ, Princeton, NJ 08545 USA

[34] Saga Univ, Saga 840, Japan

[35] Univ Sci & Technol China, Hefei 230026, Peoples R China

[36] Seoul Natl Univ, Seoul, South Korea

[37] Sungkyunkwan Univ, Suwon, South Korea

[38] Univ Sydney, Sydney, NSW 2006, Australia

[39] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[40] Toho Univ, Funabashi, Chiba 274, Japan

[41] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan

[42] Tohoku Univ, Sendai, Miyagi 980, Japan

[43] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[44] Tokyo Inst Technol, Tokyo 152, Japan

[45] Tokyo Metropolitan Univ, Tokyo 158, Japan

[46] Tokyo Univ Agr & Technol, Tokyo, Japan

[47] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

[48] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[49] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.94.181803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of the decay B-0 ->pi(0)pi(0), using a 253 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. The measured branching fraction is B(B-0 ->pi(0)pi(0))=(2.3(-0.5-0.3)(+0.4+0.2))x10(-6), with a significance of 5.8 standard deviations including systematic uncertainties. We also make a measurement of the direct CP violating asymmetry in this mode.

引用

页数：6

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